Start by entering an address or place name:
PI-SWERL data is symbolized to differentiate the individual RPM's and associated UST results for each run.
The symbol color indicates the UST emission class:
The symbol size indicates the RPM of the run. Sizes range from the lowest RPM to the highest:
At the initial map extent, the run results are stacked on top of each other:
When zoomed in on individual runs, the individual RMP's are displayed radially around the actual location: